[wasm] Fix CallIndirect with the case of no indirect function table.

src/wasm/wasm-module.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_WASM_MODULE_H_
 #define V8_WASM_MODULE_H_
 
 #include "src/wasm/wasm-opcodes.h"
 #include "src/wasm/wasm-result.h"
 
@@ skipping 162 matching lines @@
   }
   FunctionSig* GetFunctionSignature(uint32_t index) {
     DCHECK(IsValidFunction(index));
     return module->functions->at(index).sig;
   }
   FunctionSig* GetSignature(uint32_t index) {
     DCHECK(IsValidSignature(index));
     return module->signatures->at(index);
   }
   size_t FunctionTableSize() {
-    return module ? module->function_table->size() : 0;
+    return module && module->function_table ? module->function_table->size()
+                                            : 0;
   }
 
   Handle<Code> GetFunctionCode(uint32_t index);
   Handle<FixedArray> GetFunctionTable();
 
   compiler::CallDescriptor* GetWasmCallDescriptor(Zone* zone, FunctionSig* sig);
   compiler::CallDescriptor* GetCallDescriptor(Zone* zone, uint32_t index);
 };
 
 std::ostream& operator<<(std::ostream& os, const WasmModule& module);
 std::ostream& operator<<(std::ostream& os, const WasmFunction& function);
 
 typedef Result<WasmModule*> ModuleResult;
 typedef Result<WasmFunction*> FunctionResult;
 
 // For testing. Decode, verify, and run the last exported function in the
 // given encoded module.
 int32_t CompileAndRunWasmModule(Isolate* isolate, const byte* module_start,
                                 const byte* module_end, bool asm_js = false);
 
 // For testing. Decode, verify, and run the last exported function in the
 // given decoded module.
 int32_t CompileAndRunWasmModule(Isolate* isolate, WasmModule* module);
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_H_